1914] Tread ivell : New Syllidae from San Francisco Bay 237 



Dorsal cirri of about 15 joints, indistinct at base, but much more 

 distinct dorsally. Anal cirri 2, short, blunt, and not articulated. 

 Parapodium (fig-. 2), with rounded anterior and posterior lobes, 

 the former a little longer than the latter, with a tuft of compound 

 setae arising between them. Ventral cirrus beneath anterior lobe, 

 apex not reaching to apex of lobe. Setae all alike, compound, basal 

 joint relatively rather stout, slightly enlarged and obliquely trun- 

 cated at apex. Terminal joint with large blunt, apical tooth, and a 

 row of a few spine-like teeth along concave edge. These are much 

 larger at the proximal than at the distal end (fig. 3). 



At anterior end uniformly marked dorsally with numerous minute 

 broAvn spots. At somite 2 a dorso-median clear area appears, which 

 by somite 10 has formed a diamond-shaped patch in the center of the 

 dorsal surface of each somite, surrounded by a dense patch of pig- 

 ment granules. Usually a distinct line of these granules runs along 

 the edge of the somite, anterior and posterior to the colorless area, 

 ending in a triangular patch with its apex at the edge of the somite. 



Oesophagus with about 10 broad blunt lobes, and a single large 

 anterior tooth. 



Type from Presidio shore, west of Fort Point, between tide marks. 

 Co-type from Station D 5708, in dredge on sandy mud, at 10.5 to 

 12.75 fathoms. 



Autolytus varius sp. nov. Sacconereis phase 

 A single specimen, apparently not previously described from the 

 Pacific coast. The body is divided into three regions, 1. Beginning 

 with the head, with a diameter of 1 millimeter and extending to somite 

 15, with a diameter of approximately 2.5 millimeters. 2. The median 

 region, carrying a brood sack, indicated by the prominent setae and by 

 the brood sac filled with larvae. At somite 25 the body has a width of 

 3 millimeters. From somite 35 to somite 45 is a progressive narrowing, 

 the latter somite marking the limit of the median region. 3. The pos- 

 terior portion, having a fairly uniform diameter until at the very end 

 it narrows to a blunt point. 



Head with breadth about twice the length, with slight anterior 

 median notch. Palps not visible from above, small, apparently 

 separate but line of division not sharply indicated. Eyes two pairs, 

 anterior very large, brown, with prominent lenses, when seen from 

 anterior view making more than three quarters of the vertical diameter 



